JPH1114122A - Status storage device for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store the state of an air conditioner for correctly deciding whether or not a fire broke out from the air conditioner. SOLUTION: A storage control part 15 monitors whether or not inlet refrigerant temperature and outlet refrigerant temperature of indoor/outdoor heat exchangers exceed reference temperature for judgement of a fire. When any temperature exceeds the reference temperature, motor load based upon a signal from a current detection sensor 14 and temperature of all thermistors 7 to 12 are stored in a storage part 16. Thus, there can be later judged that a fire broke out from an air conditioner, or from a building where an air conditioner is installed and that it is another building adjacent to an outdoor unit based upon storage contents of the storage part 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a state storage device for an air conditioner for storing states such as a temperature of an air conditioner and a load on a compressor.

[0002]

2. Description of the Related Art Conventionally, there is an air conditioner that stores an abnormality occurrence time and an abnormality content. In this air conditioner, each of the plurality of indoor units performing the air-conditioning operation includes an abnormality detection unit that detects an abnormality and outputs an abnormality signal and a storage unit. Further, a schedule timer for transmitting time data indicating the current time to each of the indoor units is provided. When the abnormality detecting means detects an abnormality, the abnormality content based on the abnormality signal from the abnormality detecting means and the abnormality occurrence time based on the time data from the schedule timer are stored in the storage means. ing.

[0003]

However, in the above-described conventional air conditioner that stores the time of occurrence of an abnormality and the content of the abnormality, when a fire occurs, it is determined whether the fire originates from the air conditioner. However, if the determination is limited to the determination, the following problem occurs. That is, in the conventional air conditioner that stores the abnormality occurrence time and the content of the abnormality, the emphasis is placed on the storage of the abnormal state in performing the air conditioning control rather than the fire occurrence.
Although it is very useful for investigating the cause of air conditioning control abnormalities,
There is a problem that it is not clear from the stored contents whether the abnormality of the air conditioning control caused the fire.

An object of the present invention is to provide an air conditioner state storage device capable of storing the state of an air conditioner for accurately determining whether or not the fire originated from the air conditioner. .

[0005]

In order to achieve the above object, an invention according to a first aspect of the present invention is to store the state of an air conditioner having a compressor and an air conditioner having a motor for driving the compressor. A temperature sensor; a motor load sensor for detecting a load of the motor; a storage unit; and a motor when the temperature represented by the output of at least one of the temperature sensors exceeds a predetermined temperature. The storage control unit is configured to store the motor load detected by the load sensor and the temperature detected by the temperature sensor in the storage unit.

According to the above configuration, when the temperature represented by the output of at least one temperature sensor exceeds a predetermined temperature, it is determined that a fire has occurred, and the motor load and the temperatures of the respective components are stored in the storage unit. Then, after the fire is extinguished, the contents stored in the storage unit are analyzed to determine whether or not the fire originated from the air conditioner.

According to a second aspect of the present invention, there is provided an air conditioner state storage device for storing a state of an air conditioner having a compressor and a motor for driving the compressor, wherein the temperature sensor and the motor A motor load sensor that detects a load of the compressor, a pressure sensor that detects a discharge pressure of the compressor, a storage unit, a temperature detected by the temperature sensor, a motor load detected by the motor load sensor, A storage control unit is provided which stores the discharge pressure of the compressor detected by the pressure sensor in the storage unit at predetermined time intervals.

According to the above configuration, when a fire has occurred, after the fire has been extinguished, the contents stored in the storage unit are analyzed to determine whether or not the fire originated from the air conditioner.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a block diagram illustrating a state storage device of the air conditioner according to the present embodiment. In FIG. 1, reference numeral 1 denotes a compressor, which is driven by a motor 2. The high-pressure refrigerant gas discharged from the compressor 1 is supplied to the indoor heat exchanger 4 via the four-way switching valve 3 during, for example, a heating operation. The refrigerant which has been condensed in the indoor heat exchanger 4 and has become a high-pressure liquid is decompressed by the expansion means 5 and evaporated in the outdoor heat exchanger 6 to become a low-pressure gas refrigerant. Return to the compressor 1.

In the cooling operation, the four-way switching valve 3 is switched to circulate the refrigerant from the compressor 1 in the order of the outdoor heat exchanger 6, the expansion means 5, and the indoor heat exchanger 4.
The indoor heat exchanger 4 is used as an evaporator, while the outdoor heat exchanger 6 is used as a condenser.

Normally, in order to optimally control the flow of the refrigerant in the refrigerant passage having the above-described structure, the indoor heat exchanger 4 is provided with thermistors 7 and 8 for detecting the inlet refrigerant temperature and the outlet refrigerant temperature.
And a thermistor 9 for detecting the suction air temperature are already provided. Similarly, the outdoor heat exchanger 6 is also provided with thermistors 10 and 11 for detecting the inlet refrigerant temperature and the outlet refrigerant temperature and the thermistor 12 for detecting the suction air temperature. A motor driver 13 that supplies a current to the motor 2 to drive the motor 2 is provided with a current detection sensor 14 as a motor load detection unit that detects a load on the motor 2.

Therefore, in this embodiment, the occurrence of a fire is detected using the thermistors 7 to 12 already provided. That is, the thermistors 7 to
The temperature signal from 12 is sent to the storage controller 15. Then, the storage control unit 15 monitors the temperatures of the thermistors 7 to 12 based on the temperature signals from the thermistors 7 to 12. When the temperature of any one of the thermistors 7 to 12 exceeds the reference temperature for fire determination, all the thermistors 7 to 12
The temperature of の 12 and the drive current of the motor 2 based on the signal from the current detection sensor 14 are stored in the storage unit 16.

FIG. 2 is a flowchart of a storage control processing operation performed by the storage control unit 15. Less than,
The storage control processing operation will be described with reference to FIG. In step S1, the thermistors 7, 8 of the indoor heat exchanger 4
And the temperature signals from the thermistors 10 and 11 of the outdoor heat exchanger 6 to determine whether the temperature of the indoor heat exchanger 4 or the outdoor heat exchanger 6 exceeds the reference temperature 70 ° C. for fire determination. Is done. As a result, if the temperature exceeds 70 ° C., it is determined that a fire has occurred and the process proceeds to step S2.
Proceed to.

In step S2, the current detection sensor 14
The driving current of the motor 2 obtained based on the signal from
The load is stored in the storage unit 16. Step S
In 3, the temperatures based on the temperature signals from all the thermistors 7 to 12 are stored in the storage unit 16. After that,
The storage control processing operation ends.

In step S4, based on the temperature signals from the thermistor 9 of the indoor heat exchanger 4 and the thermistor 12 of the outdoor heat exchanger 6, the suction air temperature of the indoor heat exchanger 4 or the outdoor heat exchanger 6 is reduced. It is determined whether the reference temperature for fire determination has exceeded 50 ° C. As a result, if the temperature exceeds 50 ° C., it is determined that a fire has occurred and the process proceeds to step S2, where the motor load and the temperatures of all thermistors 7 to 12 are stored in the storage unit 16. After that, the storage control processing operation ends. On the other hand, if the suction air temperature does not exceed 50 ° C., the process returns to step S1. If it is determined in step S1 that the heat exchanger temperature has exceeded 70 ° C., or if it is determined in step S4 that the suction air temperature has exceeded 50 ° C., the motor load and all thermistors 7-1 are determined.
2 is stored in the storage unit 16 and the storage control processing operation ends.

Here, the reference temperature for determining the fire is not limited to 70 ° C. and 50 ° C. In short,
It cannot be realized in the ordinary air conditioning control operation, and the temperature may be any temperature at which the environment can be determined to be a fire.

As a result, when a fire occurs, the storage unit 1
6 stores the drive current of the motor 2 as a motor load, the temperature of the indoor heat exchanger 4 and the outdoor heat exchanger 6, and the temperature of the suction air between the indoor heat exchanger 4 and the outdoor heat exchanger 6. I have. Therefore, if the contents of the storage unit 16 can be deciphered after the fire is extinguished, the origin of the fire can be determined as follows.

(1) The temperature of the thermistors 7 and 8 of the indoor heat exchanger 4 is 70 ° C. or more, the temperature of the thermistor 9 is 50 ° C. or more, and the thermistor 1 of the outdoor heat exchanger 6
When the temperatures of 0, 11, and 12 are normal and the drive current of the motor 2 is normal. In this case, the environment in which the indoor heat exchanger 4 Thermistor 7,
It can be determined that the temperatures 8 and 9 have become abnormally high. Therefore, it can be inferred that the fire source is the building in which the indoor unit of the air conditioner is installed.

(2) The temperature of the thermistors 7, 8, 9 of the indoor heat exchanger 4 is normal, the temperature of the thermistors 10, 11 of the outdoor heat exchanger 6 is 70 ° C. or more, and the temperature of the thermistor 12 is When the temperature is 50 ° C. or higher and the drive current of the motor 2 is normal. In this case, since the environment in which the outdoor heat exchanger 6 is installed becomes high temperature, the thermistor 1 of the outdoor heat exchanger 6
It can be determined that the temperatures 0, 11, and 12 have become abnormally high.
Therefore, the fire source can be assumed to be another building adjacent to the outdoor unit side of the air conditioner.

(3) The temperatures of the thermistors 7, 8, 9 of the indoor heat exchanger 4 are normal, the temperatures of the thermistors 10, 11 of the outdoor heat exchanger 6 are 70 ° C. or more, and the temperature of the thermistor 12 is Normal and drive current of the motor 2 is abnormal. In this case, it can be determined that the temperature of the thermistors 10 and 11 of the outdoor heat exchanger 6 has become abnormally high because the temperature around the motor 2 has become high. However, an abnormal current is flowing through the motor 2. Therefore, the fire source can be inferred to be the motor 2 of the air conditioner.

As described above, in the present embodiment, the storage control unit 15 is provided, and the storage control unit 15 determines the inlet refrigerant temperature and the outlet refrigerant temperature of the indoor / outdoor heat exchangers 4 and 6 to determine whether a fire has occurred. It is monitored whether or not the reference temperature for use exceeds 70 ° C. Further, it monitors whether or not the temperature of the intake air of the indoor / outdoor heat exchangers 4, 6 exceeds a reference temperature for fire determination of 50 ° C. When any one of the temperatures exceeds the reference temperature, the motor load at that time and all thermistors 7 to 7 are output.
12 is stored in the storage unit 16.

Therefore, by decoding the contents of the storage unit 16 later, the fire origin is the air conditioner, the building in which the air conditioner is installed, or another building adjacent to the outdoor unit. Can be determined.

In this embodiment, the thermistors 7, 8 for detecting the inlet refrigerant temperature or the outlet refrigerant temperature of the indoor heat exchanger 4, thermistors 9 for detecting the suction air temperature, and the outdoor heat exchanger 6 Existing thermistors, thermistors 10 and 11 for detecting the inlet or outlet refrigerant temperature and thermistor 12 for detecting the suction air temperature, are used as the temperature sensors. However, the temperature sensor used in the present invention is not limited to these, and may be another existing thermistor, or may be provided with a new thermistor.

In the above embodiment, the inlet refrigerant temperature, the outlet refrigerant temperature, the suction air temperature,
Alternatively, when the inlet temperature, outlet temperature, and suction air temperature of the outdoor heat exchanger 6 exceed the reference temperature for fire determination, the motor load and the temperatures of all thermistors 7 to 12 are stored in the storage unit 16. I have to. However, the present invention is not limited to this, and includes a pressure sensor for detecting the discharge pressure of the compressor 1, the temperature detected by the thermistors 7 to 12, and the motor 2 detected by the current detection sensor 14. The drive current and the discharge pressure of the compressor 1 detected by the pressure sensor may be stored in the storage unit 16 at predetermined time intervals. By doing so, the cause of the air conditioner failure or fire can be determined based on the temperature, the drive current of the motor 2, and the history of the discharge pressure of the compressor 1.

[0025]

As is clear from the above, the state storage device of the air conditioner according to the first aspect of the present invention has at least one state storage device.
When the temperature based on the outputs of the two temperature sensors exceeds a predetermined temperature, the storage control unit stores the motor load detected by the motor load sensor and the temperature detected by the temperature sensor in the storage unit. By analyzing the contents stored in the storage unit, it is possible to determine whether or not the fire source is the air conditioner.

The state storage device for an air conditioner according to the second aspect of the present invention includes a temperature detected by a temperature sensor, a motor load detected by a motor load sensor, and a compressor load detected by a pressure sensor. Discharge pressure,
Since the storage control unit causes the storage unit to store the information at predetermined time intervals, it is possible to determine whether or not the fire source is the air conditioner by analyzing the storage content of the storage unit later.

[Brief description of the drawings]

FIG. 1 is a block diagram of a state storage device of an air conditioner of the present invention.

FIG. 2 is a flowchart of a storage control processing operation performed by a storage control unit in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... compressor, 4 ... indoor heat exchanger, 5 ... expansion means, 6 ... outdoor heat exchanger, 7-12 ... thermistor, 13 ... motor driver, 14 ... current detection sensor, 15 ... storage control part, 16 ... storage Department.

Continuing on the front page (72) Inventor ▲ Kiichi Saka Keiichi 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Inside the Kanaoka Plant of Sakai Seisakusho Co., Ltd. (72) Ryoji Inoue 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries, Ltd Sakai Plant Kanaoka Factory

Claims (2)

[Claims] An air conditioner state storage device for storing a state of an air conditioner having a compressor (1) and a motor (2) for driving the compressor (1), comprising: 12) and a motor load sensor (1) for detecting the load of the motor (2).
4), the storage unit (16), and when the temperature represented by the output of at least one of the temperature sensors (7 to 12) exceeds a predetermined temperature, the temperature is detected by the motor load sensor (14). A state storage device for an air conditioner, comprising: a storage control unit (15) for storing a motor load and a temperature detected by the temperature sensor (7 to 12) in the storage unit (16). . 2. An air conditioner state storage device for storing a state of an air conditioner having a compressor (1) and a motor (2) for driving the compressor (1), comprising: 12) and a motor load sensor (1) for detecting the load of the motor (2).
4), a pressure sensor for detecting a discharge pressure of the compressor (1), a storage unit, and a temperature detected by the temperature sensor (7 to 12).
The motor load detected by the motor load sensor (14) and the compressor detected by the pressure sensor
A state storage device for an air conditioner, comprising: a storage control unit that stores the discharge pressure of (1) in the storage unit at predetermined time intervals.